This family of diuretics was invented to avoid the potassium loss common with loop and thiazide diuretics.

Potassium-sparing diuretics include drugs such as amiloride hydrochloride (Midamor), spironolactone (Aldactone), and triamterene (Dyrenium), among others.

Potassium

Likely Harmful Interaction

Potassium-sparing diuretics cause the kidneys to hold potassium in the body. When you are taking these medications you generally should not take potassium supplements because your potassium levels might rise too high.

Treatments that combine thiazide diuretics (which cause potassium loss) and potassium-sparing diuretics can affect potassium levels unpredictably. If you are taking such a combination medication, do not take potassium except on the advice of your physician.

Arginine

Possible Harmful Interaction

Based on experience with intravenous arginine, it is possible that the use of high-dose oral arginine might alter potassium levels in the body, especially in people with severe liver disease.1
This is a potential concern for individuals who take potassium-sparing diuretics.

White Willow

Possible Negative Interaction

The herb white willow contains substances very similar to aspirin. On this basis, it might not be advisable to combine white willow with potassium-sparing diuretics.

Zinc

Possible Harmful Interaction

The potassium-sparing diuretic amiloride was found to significantly reduce zinc excretion from the body.3
This means that if you take zinc supplements at the same time as amiloride, zinc accumulation could occur. This could lead to toxic side effects.

However, the potassium-sparing diuretic triamterene does not seem to cause this problem.4

Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.